Pingré

Lat: 58.7°S, Long: 73.7°W, Diam: 88 km, Depth: 4.05 km, Rükl 70

Images

Pingré was also captured near the lower margin of Lunar Orbiter IV's frame LO-IV-187-med. Research Danny Caes

(IAU Directions) PINGRE.--A ring-plain, about 18 miles in diameter, between Phocylides and the limb.

Depth data from Kurt Fisher database

Alexandre Guy Pingré (September 11, 1711 - May 1, 1796) was a French astronomer and naval geographer. Unfortunately he had poor eyesight so his observing skills were limited, but he did earn a reputation as an excellent mathematician. In 1757 he became interested in comets and published a substantial treatise on the theory and observational history of comets. Subsequently he published a nautical almanac base on the work of P. Charles Lemonnier containing lunar tables.
Pingré S could have been known as La Paz (thus named by John Westfall and the ALPO), but... it was not approved by the IAU as the name of a lunar crater. It is on Mars. For the La Paz/ Pingré S case, see the page Luna Incognita. - DannyCaes Oct 9, 2014
Smooth Patch (not really a name) is mentioned on page 191 of Charles J. Byrne's The Far Side of the Moon; a Photographic Guide (Springer, 2008). This smooth patch's location is north of Pingré L and Pingré M, see: http://bit.ly/2Bmqx2H

- Page 133 in Mysterious Universe, a handbook of astronomical anomalies (1979) :

Pingré is mentioned in: Varro's Story of the Anomalous Track and Figure of Venus (Nature, 1879).